Drill.



S. DOUBET.

DRILL.

APPLICATION FILED NOV. 1, 1906.

1,01 3,28 1' Patented Jan. 2, 1912.

2 SHEETS-SHEET 1.

I u u I" I S. DOUBET.

DRILL.

APPLICATION FILED NOV. 1, 1906.

1,013,281. Patented Jan2,1912.

2 SHEETS-SHEET 2 UNITED STATES PATENT OFFTCE.

SYLVESTER DOUBET, OF PEORIA, ILLINOIS, ASSIGNOR 'lO WANTLING MFG. (10.,OF PEORIA, ILLINOIS, A CORPORATION OF ILLINOIS.

DRILL.

Specification of Letters Patent.

Patented Jan. 2,1912.

To all whom it may concern:

Be it known that I, SYLVESTER DOUBET, a citizen of the United States,residing at Peoria, in the county of Peoria and State of Illinois, haveinvented certain new and useful Improvements in Drills; and I do herebydeclare that the following is a full, clear, and exact description ofthe invention, which will enable others skilled in the art to which itappertains to make and use the same.

This invention has reference to improvements in drills and relatesparticularly to a coal-drill, although the application of the inventionmay be equally as well applied to other forms of drills.

One of the objects of the present invention is in the provision of meansfor reducing friction and making the drill run lighter, by keeping thelarge bevel gear wheel on the thread-bar straight and true on said bar,so that said gear wheel will have a perfect mesh with the driving pinionat all times.

A further object of the invention is in the provision-of means forreducing friction, said means comprising a ball retainer supportedwithin a gear-nest with the bevel gear on the thread-bar.

The invention consists essentially of a boxing composed preferably oftwo hinged sections, a gear-nest supported by the lower section of saidboxing and provided with a bearing for the hub of a bevel gear-wheelcarried on a thread-bar operating in said boxing, and to meansinterposed between the gear-nest and said gear on the threadbar forreducing friction during the operation of said thread-bar and forholding the gear on the thread-bar even and true on said bar, and inperfect mesh with a driving pinion carried on a stud, projectinglaterally from the lower section of said boxing.

That the invention may be more readily understood, reference is had tothe accompanying drawings, in which Figure 1 is a plan view of a boxingand a thread-bar, showing my improvements applied thereto; Fig. 2 is afront elevation of the parts seen in Fig. 1, showing the threadbar incross section; Fig. 3 is a side elevation of the boxing shown in Fig. 1;the thread-bar being omitted and the bevel gear carried thereby beingshown in dotted lines;

Fig. 4 is an enlarged face view of a ball retainer and the ballstherein; Fig. 5 is an enlarged sectional detail showing the manner ofsecuring the balls in said retainer, and Fig. 6 is a side elevation,somewhat similar to that shown in Fig. 8, but only showing the forwardportion of the boxing in which said view illustrated the use of meansintegral with the gear-nest for holding the bevel gear true to its workon the thread-bar and in mesh with the bevel driving pinion, in lieu ofthe ball retainer, shown in Figs. 1 and 4; Fig. 7 is a longitudinalsectional view through Fig. 1 on a plane taken longitudinally throughthe feed screw thereof; Fig. 8 is a longitudinal sectional view throughFig. 6 on a plane taken longitudinally through the feed screw thereof.

Like numerals of reference indicate corresponding parts throughout thefigures.

The boxing referred to consists preferably of the upper and lower hingedsections .1 and 2, being somewhat similar to the ordinary boxingsemployed for use in connection with coal-drills, wherein the top sectionis hinged to the lower section at 3, and a pin 4: is employed,substantially in the manner seen, for locking the sections 1 and 2together. Although not shown, the interior of the sections 1 and 2 aresuitably threaded and serve as a nut to be engaged by a threadbar 5operating in the said boxing. The removal of the pin 4: allows for theopening of the sections of said boxings,

whereby the thread-bar may be placed or removed at the will of anoperator. At the rear end and extending laterally from opposite sides ofthe section 2 of the boxing are provided trunnions 6, having the outerflanged heads 7 as shown. By means of such trunnions, as will beunderstood, the boxing may be suitably supported in a bracket or someother support of a post-drill or a grip-drill. Projecting laterally fromone side of the forward end of the lower section 2 of said boxing is aspindle 8, and

on this spindle is carried a pinion 9, prefwhich has an extended erablya bevel-gear, hub portion 10 which is squared as at 11, to adapt theconnecting therewith of some suitable tool for operating the saidpinion. And said pinion is retained in operative working position on thespindle 8, by means of a collar 12; and between the said collar saidring is and the hub of the said pinion is carried a ball retaining ring13, which is in all respects similar to the ball retainer shown in Figs.4 and 5, 'in which is suitably secured the balls 14 which have a rollingcontact with the hub of the pinion and the collar aforesaid, serving asa ball bearing for said pinion, relieving the same of any friction onsaid collar and materially assisting in the smooth operation of saidpinion.

15 refers generally to a gearnest which may be formed integral with orattached to the lower section 2 of the boxing, it being preferable tomake said nest a part of the section 2, as shown in the drawings. Saidnest consists of the forward portion 16 con-- nected with the forwardend of the lower portion of the section 2 of the boxing by means of theweb 17, which extends downwardly and forwardly from the boxing andmergesinto the portion 16 of said nest, as shown; and from the portion 16 andextending from the opposite sides thereof are the webs 18 and 19, whichare substantially U shaped as shown in Fig. 1 and connecting with theforward end of the section 2 of the boxing, the web 19, being curvedclownwardly and upwardly as shown in Fig. 2 to avoid the pinion 9 asshown. The portion 16 of said nest is cut out as at 20, forming thebifurcated ears 21 and also a slotted bearing 22 in which may bedetachably seated an extended hub 23, of a bevel-gearwheel 24, which isintended to be in con stant mesh with the pinion 9 when the thread-bar 5is in working position in the hinged boxing, said thread-bar beinggrooved and the hub of the pinion being provided with a spline so as toadapt the bevel gear 24 when being operated, not o11l to impart powerfrom the pinion 9 to the thread-bar 5, but also to allow the saidthread-bar to have longitudinal movement through the said gear.

When the bar has been placed in the boxing and the gear 24 is in workingposition in the gear-nest 15 shown in Fig. 1, there is preferablyinterposed between the rear face of the gear and the inner face of theportion 16 of the gear-nest, and on the hub of said gear, a ballretainer indicated as 25 and a flat ring 26. The ball retainer is anannular ring adapted to be slipped over the thread-bar and the hub ofthe gear 24 and provided with a pair of flanges 25 between which isformed an annular groove 27, the said flanges being provided with aseries of corresponding openings 28 disposed in an irregular circle asshown in Fig. 4. The flanges thereof may be made of some suitable springmetal, so that balls 29 which may be forced into the annular 'groove27and which are made to co-incide with the openings 28 in the flanges ofthe ring, will be yieldingly retained in the be understood.

In the operation of the drill, the use of the balls employed in themanner shown will relieve all friction incident to the operation of thethread-bar and the gear and pinion, and the bearing furnished by saidballs between the gear 24 and the flat ring 26 keeps the largegear-wheel in a true working position on said thread-bar and also inperfect mesh with the pinion at all times, the result of which is theobviation of 'any friction and materially aids the free and perfectoperation and light running of said device.

In Fig. 6 of the drawings a boss 30 is shown, and although attached toor made a part of and projecting inwardly from the face of the portion16 of the gear-nest 15, may be attached to or formed a part of thegear-wheel 24 and extend outwardly there'- from; said boss at the ears21, preferably conforming thereto (if attached to the portion 16) andextending across the face of the portion 16 beneath the opening formedtherein. Such boss is intended to take the place of the ball bearing useof the ball retaining ring 25 and the balls thereof. While the bossitself does not relieve the friction to the extent that the ballretaining ring would, yet such boss will hold the gear to its work, trueon the thread-bar and in perfect mesh with said pinion.

I am aware that it is not new to provide a gear-nest for machines of thegeneral character herein shown, but I am not aware of the provision of agear-nest which is formed integral with the lower sect-ion of a hingedboxing, as shown. I do know that they have been made in different formsattached to a one part sleeve forming the nut for the thread-bar. Withthe arrangement I have shown a gear-nest is provided which fulfilsprovided by the the requirements of such an element and the dispositionof the same is such that when the top section of the hingedboxing isopened the thread-bar and parts thereof may be very easily removed orreplaced, the arrangement of the nest not interfering with such removalor replacing of the parts indicated as is found in the gear-nests whichhave been heretofore used.

Having thus fully described my invention, what I claim and desiretosecure by Letters Patent of the United States, is

1. Ina device of the character described,

the combination of a boxing composed of hinged sections, the lowersection at one end provided with a gear-nest, formed integrally withsaid section and composed of a forward portion spaced a suitabledistance from said boxing and having a slotted face at its upper endadapted to serve as a bearing for an extended hub portion of a gear tobe retained within said nest, and laterally extending webs connectedwith the body of said nest and united with said lower section forbracing said nest.

2. In a device of the character described, the combination of a boxingcomposed of hinged sections, the lower section at one 'end provided witha gear-nest formed integrally with said section and composed of aforward portion spaced a suitable distance from said boxing and having aslotted face formed between bifurcated ears adapted to serve as abearing for an extended hub portion of a gear to be retained within saidnest, and substantially U shaped portions connecting the opposite sidesof the body of said nest with said lower section for bracing said nest.

3. In a device. of the character described, the combination of a boxingcomposed of upper and lower hinged sections, a gear-nest formedintegrally with and disposed at one end of said lower section of saidboxing, the same consisting of a vertical wall spaced a suitabledistance from said boxing and having a slotted bearing at its upper endadapted to receive and serve as a bearing for an extended hub portion ofa gear, a web extending downwardly and forwardly from said lower sectionand merging into the said wall, and webs extending in oppositedirections from said front wall and at their opposite ends merging intosaid lower Copies of this patent may be obtained for section, said websforming a closure for the gear aforesaid.

4. In a drill, the combination of a boxing, a thread-bar operatingthrough said boxing, a gear on said thread bar, means for operating saidgear, a gear-nest for said gear, to retain the gear in operativerelation with its operating means and said thread-bar, said nestcomposed of a front wall connected to the end of the boxing by a loweraxially alined web, laterally extending U shaped webs connecting theopposite sides of said wall with the opposite sides of said boxing, andsaid front wall of said nest provided with upwardly extending bifurcatedears which extend up above the axial center of said thread-bar.

5. In a. drill, the combination of a boxing composed of two hingedsections, a threadbar operating through said sections, a gear carried onsaid thread-bar, a spindle projecting radially from the lower section, apinion on said spindle in mesh with said gear, a gear-nest for said gearconsisting of a vertically disposed portion connected with said lowersection by a web, laterally disposed braces for said vertical portionconnected with said lower section, one of said laterally disposed bracesbeing curved downwardly and upwardly so as not to interfere with saidpinion, and said vertically disposed portion provided with bifurcatedears extending up above the axial center of said thread-bar.

In testimony whereof I aflix my signature, in presence of two witnesses.

SYLVE STER DOUBET.

Witnesses:

CHAS. W. LA PORTE, J. M. ANDERSON.

five cents each, by addressing the Commissioner of Patents, Washington,D. C.

